DISSOLVED AIR FLOTATION UNITS - DAF
5
ЕНВОТЕХ ЕООД ул. Леонардо да Винчи №20, 4000 Пловдив, България тел.: 032 620802, www.envotech.bg, e-mail: [email protected] ENVOTECH.BG ENVOTECH LTD, 20 Leonardo da Vinchi Str. 4000 Plovdiv, Bulgaria WATER AND WASTEWATER TREATMENT ENGINEERING Design and supply of water purification systems, wastewater, primary and drinkable water treatment. DISSOLVED AIR FLOTATION UNITS - DAF Efficiency 30% removal efficiency of BOD5/COD 90% of biological sludge, particles, fats and oils. Flow Wide range of capacities (from 1 to 80 m3/hour and more). Material - Made to last. Completely built in stainless steel AISI 304 as standard, AISI 316 on request. Flexibility Suitable to be personalized for any particular requirement (lamella pack, additional pH-meter, ORP controller, selective electrodes for ionic compounds, chlorine controller and solids detector). Design and production of ENVOTECH LTD Full CE certification. Tipical applications of the Dissolved Air Flotation Suitable to: Dairy - Slaughter houses - Meat processing - Poultry - Brewery - Winery and acohol manufacture - Canning and meals production - Vegetable processing - Fish processing Paper mills - Petrochemical - Cosmetics - Textile manufacture - Mechanical productions with oil and grease pollutions - Oil refinery - Mining ENVOTECH LTD - DAF FLOTATION UNITS – VER. 2017
Transcript of DISSOLVED AIR FLOTATION UNITS - DAF
ЕНВОТЕХ ЕООД ул. Леонардо да Винчи №20, 4000 Пловдив, Българиятел.: 032 620802, www.envotech.bg, e-mail: [email protected]
ENVOTECH.BG
ENVOTECH LTD, 20 Leonardo da Vinchi Str. 4000 Plovdiv, Bulgaria
WATER AND WASTEWATER TREATMENT ENGINEERING
Design and supply of water purification systems, wastewater, primary and drinkablewater treatment.
DISSOLVED AIR FLOTATION UNITS - DAF
BOD5/CODarticles, fats and oils.
Design and production of ENVOTECH LTD
Full CE certification.
TipicaSuitablemanufaPaper mgrease
from 1 to 80 m3/hour
l application to: Dairy - Sla
cture - Canning ills - Petrochem
pollutions - Oil re
Efficiency30% removal efficiency of90% of biological sludge, p
FlowWide range of capacities (
and more).Material - Made to last.
Completely built in stainless steel AISI 304 as standard, AISI 316 on request.
FlexibilitySuitable to be personalized for any particular requirement (lamella pack, additional pH-meter, ORP controller, selective electrodes for ionic compounds, chlorine controller and solids detector).
s of the Dissolved Air Flotation ughter houses - Meat processing - Poultry - Brewery - Winery and acohol and meals production - Vegetable processing - Fish processingical - Cosmetics - Textile manufacture - Mechanical productions with oil and finery - Mining
ENVOTECH LTD - DAF FLOTATION UNITS – VER. 2017
DISSOLVED AIR FLOTATION UNITS - DAFDESCRIPTIONFlotation is a process to separate suspended or emulsified matters from the liquid phase floating them through the action of a rising gas stream, normally air. The gas can be, either injected, or dissolved under pressure into the water.
In the first case (IAF or induced air flotation), air issimply introduced into the water by a compressor andair diffusers. The air bubbles diameter varies from 1 to 5 millimetres, according to the used diffusers.
In the second case (DAF or dissolved air flotation), air is dissolved under pressure into the water to produce, once pressure is released, air bubbles with a diameter of 20 to 50 microns that saturate the whole liquid mass.
The raising of suspended matters occurs, either for capture and absorption of air bubbles by the solids in suspension, and for adhesion of the bubbles to the solid flocks.
The result is the formation of a light particulate that quickly rises forming a layer on the surface of the clarified water.
The process applied in the purification of wastewater for recovery and re-use, containing oils from mechanical production company in Netherland.
After and before treatment.
ENVOTECH LTD - DAF FLOTATION UNITS – VER. 2017
Envotech DAF exittreated water from
meat processing mixed effluent.
The pressurising system used in our DAF units (continuous circulating of the mixture from the group of saturation to the one of dissolution) allows to obtain over saturated water/air mixtures with low power and low energetic consumption. Moreover, this system allows to introduce air to anindependent pressure from the working pressure of the saturation group.
Wastewater to be treated enters a reaction coil particularly shaped to allow a thorough contact andcomplete mixing with the dosed chemicals.
The dosage of chemicals in the reaction coil is carried out with high reliability systems and high performances metering pumps. The control of the pH is always on-line with industrial instruments of great precision and electrodes of combined type in solution gel.
The water/air mixture is injected after the chemicals dosage in many different points of the reaction coiland flotation tank, to obtain the most uniform possible distribution of its concentration in the fluid mass and an intimate contact with the flocks to be removed.
In this way, already in the reaction coil the flocks produced by the reaction with the dosed chemicalsabsorb air particles, to advantage of the reliability of the process and of their rising speed.
The flow of the saturated water/air mixture and wastewaters conditioned with the chemicals, isthen introduced in the flotation tank through a conical profile ejector to increase in a progressive way therising speed of the solid flocks stuck to the air bubbles.
Image
DISSOLVED AIR FLOTATION UNITS - DAF
ENVOTECH LTD - DAF FLOTATION UNITS – VER. 2017
DISSOLVED AIR FLOTATION UNITS - DAFThus, a thick layer of floated materials grows on the surface of the flotation tank and it is removedby a scraper.
The conveying course of the floated materials to the collection hopper, is built with a curved profileconnection, so to facilitate the water-drainage and achieve a high concentration of dry matter into thedischarged sludges.
A specially shaped telescopic valve collects clear water and allows to control the level into the flotationtank, thus the quantity of sludge to be removed.
The water flow speed is calculated non to disturb the rising of lighter materials and the sedimentation ofthe heavier. Settled materials are discharged through an automatic valve.
The software controlling and rulingthe entire process is of high reliability (written for PLC SIEMENS, but exportable also to other PLC on request) and guarantees always the best conditions and performances of treatment.
A remote control of the operations with a SCADA interface is available as option, as well as the transfer of all the working data on a PC with a TCP/IP protocol.
All junctions are sealed with stainless steel cold-shut paste to prevent entering of water condensate into the reinforcement structure and subsequent tricklingon the metal surfaces.
These and other constructive particulars, make the DAF units particularly fit for the treatment of industrial wastewaters from industries of the oil,mechanics, galvanic and textiles, refineries, as well as any alimentary industry as dairies, meat processing industries, sweet and chocolate industries, wine, beer and liquors industries.
ENVOTECH LTD - DAF FLOTATION UNITS – VER. 2017
DISSOLVED AIR FLOTATION UNITS - DAFThe available models cover a great range of capacities (from 1 to 100 m3/hour and more) and may be completed with modular units for a complete treatment of wastewaters, such as chemical oxidation, filtration on resins, quartzite and activated coal, units for biological treatment, etc.
All the units are completely built in stainless steel AISI304, other materials on request.
DAF units are supplied ready to be installed, and on request installed, started and tested by our technicians.
All DAF units have CE certifications and are supplied with complete use and maintenance handbook.
MODELS AND TECHNICAL CHARACTERISTICS
NOTE: For any other need or question, please contact our technical office.
ENVOTECH Ltd. has the right to make changes at any time, even without notice,in order to achieve better performances and quality of its products.
ENVOTECH LTD - DAF FLOTATION UNITS – VER. 2017
